Try-square



Patented Sept. 9, 1924.

UNITED" STATES EMIEL PfSEGHE-RS, OE CHICAGO; ILLINOIS.

' i I rmnsaoenn.

Application filed April 26, 1922. Serial No. 556,723.

ToaZZ whom it may concern:

Be it known that I, EMIEL P. Snonnns, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented certain new and useful Improvements in Try-Squares, of whichthe following is'a specification.

This invention relates to an adjustable try-square and has for itsobject the provision of a tool of the class named which shall be ofimproved construction, convenient and efiicient in operation, andeconomical to manufacture.

The invention is exemplified in the combination and arrangement of partsshown in the accompanying drawing and described in the followingspecification, and it is more particularly pointed out in the appendedclaims. a

In the drawing- Fig. 1 is an elevation of one embodiment of the presentinvention;

Fig. 2 is a section on line 22 of Fig. 1;

Fig. 3 is a fragmentary view similar to Fig. 1 showing the try-squareblade arranged at an oblique angle;

Fig. 4 shows the blade and dial of the square removed from the entireblock; and

Fig. 5 is a section on line 55 ofFig. 4.

In the embodiment of the invention shown in the drawing, the numeral 10designates a block of wood or other suitable material having a slot 11formed therein for receiving the try-square blade 12. A bolt 13 projectsthrough an opening near the end of the block 10 and is provided with awing nut 1 1 for tightening the bifurcatedportion of the block 10 uponthe blade 12. The bolt 13 extends through a slot 15 in the'blade 12, thewidth of the slot being equal to the diameter of the bolt. It will beapparent that the blade 12 may he slid to various positions transverselyof the block 10 and that it may be swung about-the bolt 13 as a pivot toany angular position desired.

In order to indicate the angle at which the blade is positioned acircular dial 16 is provided having graduations 17 arranged upon itsface, the numerals 18 being positioned on the dial outside of thegraduations. A pair of stops 19 are struck outwardly from the dial 16and register with the slot 15 in the blade 12. The stops 19 are of thesame width as the slot so that the blade may be slid along the stops asguides, but any rotary movement of the blade about the bolt 13 willcause the dial 16 to rotate in unison therewith.

The end of the block 10 is provided with a notch 20 through which thegraduations on the dial 16 may be read to-indicate the angular positionof the dial and blade. An

opening 21 13 and fits snugly upon thebolt. cases itmay be desirable toattach a, sheet metal plate 22 to the end of the block 10 having a slot23 therein registering with the slot 20 to facilitate accurate readingofthe dial. The plate 22 may be inserted in a groove formed in the end ofthe block 10 in which it is tightly held by friction but along f in thedial accommodates the bolt In somewhich it may he slid by the exertionof sufficient force to accurately adjust the posit on of the slot. Othersuit-able forms of indicators may be used for designating readings onthe dial without departing from the spirit and scope ofthe invention.

The head 24 of the bolt 13 may be countersunk in the rear of the block'10 to form-a smooth surface, and in some cases it may be desirable tonotch the end oft-he bolt 13 by means of a chisel, as shown at 25, or

otherwise obstruct the threads at the end of,

the bolt to prevent loss of the wing nut 14:.

I claim i i y 1. A try-squarecomprising a supporting block, abladepivotally mounted adjacent one end of said block, and a circulardial mounted on the .pivot of said blade and extending beyond the end.of said block and arranged to cooperate with said blade to indicate theangular position thereof, said dial having graduations thereon andnumerals for designating the different graduationson said dial, saidnumerals being positioned on said dial outside of the graduationsthereon and on the portion of the dial extending beyond. the end of saidblock.

2. Atry-square comprising a support having a blade pivotally mountedtherein adjacent one end thereof, a rotary dial mounted on said supportto rotate about the pivot 'of said blade for indicating the angularposition of said blade, graduations formed on'the lateral face of saiddial, said support having a slot therein extending inwardly from the endthereof to permit said graduations to be seen therethrough, and numeralsfor designating various graduations on said dial, said numerals beingpositioned on a portion of the lateral face of said dial outside of saidgraduations and beyond the end of said support so that said numeralsWill not be obscured by the slotted portion of said support.

3. A try-square comprising a supporting block having resiliently spacedbifurcations, a blade arranged between said bifurcations and having alongitudinal slot therein, a circular dial positioned adjacent one faceof said blade and having a portion thereof extending beyond the end ofsaid block, a pivot bolt e:-;ten ;ling through the bifurcations of saidsupporting block and through said dial and the slot in said blade, a nuton said bolt for clamping said bifurcations against said blade and dialto retain said blade in fixed position relative to said blockprojections extending from the face of said dial and registering withsaid slot to cause said dial to rotate about said pivot in unison Withsaid blade While permitting longitudinal movement of said blade,graduations on the lateral face of said dial for indicating the angularposition of said blade, an index on said block at the end thereof beyondthe pivot for said blade for cooperating With said graduations andnumerals on the lateral face of said dial outside of the gradua-ti'onsthereon.

In a try-square, a movable dial having graduations thereon, a pivotalsupport for said dial, and an indicator on said support for cooperatingWith said dial, said indicator being adjustable on said support foraccurately positioning the same for correct reading in conjunction Withsaid dial.

5. A try-square comprising a supporting block, a blade pivotally mountedon said block, a dial carried bysaid block for pivotal movement inunison With said blade, and a plate having a slot therein for indicatingthe readings on said dial, said late being adjustably mounted on saidbloc to permit movement thereof for accurately positioning the samerelative to said block and dial.

6. A try-square comprising a bifurcated block a blade positioned betweenthe bifurcations of said block and having a longitudinal slot therein adial slidably engaging said slot but held against rotation relative tosaid blade, a pivot extending through said dial and slot and mountedadjacent the bifurcated end of said block, one bifurcation of said blockhaving a slot in the end thereof, and a plate mounted in said slot andhaving an index thereon for cooperation with said dial, said plate beingslidable in said slot for adjusting the position of said index andfrictionally held in its adjusted positions. s In testimony whereof Ihave signed my name to this specification on this 21st day of April, A.D. 1922.

EMIEL P. SEGHERS.

